Damage evaluation and damage localization of rock


Autoria(s): 许向红; Ma SP; 夏蒙棼; 柯孚久; 白以龙
Data(s)

2004

Resumo

Knowledge of damage accumulation and corresponding failure evolution are prerequisite for effective maintenance of civil engineering so as to avoid disaster. Based on statistical mesoscopic damage mechanics, it was revealed that there are three stages in the process of deformation, damage and failure of multiscale heterogeneous elastic-brittle medium. These are uniformly distributed damage, localized damage and catastrophic failure. In order to identify the transitions from scattering damage to macroscopically localized one, a condition for damage localization was given. The experiments of rock under uniaxial compression with the aid of observations of acoustic emission and speckle correlation do support the concept of localization. This provides a potential approach to properly evaluate damage accumulation in practice. In addition, it is found in the experiments that catastrophic failure displays critical sensitivity. This gives a helpful clue to the prediction of catastrophic failure. (C) 2004 Elsevier Ltd. All rights reserved.

Identificador

http://dspace.imech.ac.cn/handle/311007/33739

http://www.irgrid.ac.cn/handle/1471x/2718

Idioma(s)

英语

Fonte

Theoretical and Applied Fracture Mechanics.2004,42(2):131-138

Palavras-Chave #Damage Localization #Critical Sensitivity #Deformation
Tipo

期刊论文